The Odeon is expected to have 70 luxury apartments, two "sky duplexes" of about 13,000 square feet -- and crowning it all, a five-floor, 35,500-square-foot "sky penthouse" with its own private swimming pool, according to press materials provided to Yahoo! Homes. (Related on Yahoo! Homes: A New York penthouse with a slide connecting two floors.)

Whatever the estimate, the consensus is that the home has a very real shot at the title of world's most expensive penthouse, currently held by London's One Hyde Park, where a penthouse reportedly sold for $212 million.